-14.33% is the change from 970 to 831
Calculation steps:
[( 831 - 970 ) ÷ 970] x 100 = -14.33%
Formula
Percentage change = [(831 - 970) / 970] x 100
Subtract the new number by the original number
831 - 970 = -139
-139 ÷ 970 = -0.14329896907216494
-0.14329896907216494 x 100 = -14.33%